test

Add nix version as part of the nix cache key #289

Job	Run time
test-action-with-sha256-checksum	49s
test-action (macos-13, true)	1m 40s
test-action-with-sha256-checksum-failure	10s
test-action (macos-13, false)	3m 1s
test-action-with-sha256-checksum-on-mac	1m 27s
test-action-with-version	42s
test-action (macos-14, true)	1m 17s
test-action (macos-14, false)	1m 15s
test-action (macos-latest, true)	57s
test-action (macos-latest, false)	1m 27s
test-action (ubuntu-latest, true)	19s
test-action (ubuntu-latest, false)	44s
	13m 48s

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